User Manual

Maintenance RF-Baton! Transmitter Controller Installation and Operation
6-24 6880497G01-B June 1999
GPS Diagnostics
The RF-O! paging station can use a Motorola or an external GPS receiver. The Motorola GPS
receiver mounts on the reference module board next to the BCM (see Figure 6-1). The external
receiver mounts in the antenna and sends RS-422 signals to the RF-B! transmitter controller.
The RF-B! transmitter controller controls the GPS receiver functions and receives GPS timing
from the receiver.
This section provides information for the Motorola GPS receiver. The FIPS display screens for
the Trimble GPS receiver differ from those for the Motorola GPS receiver.
1. Connect your FIPS terminal to the FIPS Serial Port on the front panel of the RF-B!
transmitter controller and log into the FIPS session (see Chapter 5, "Operation",
paragraph, "Service Terminal").
2. Display the Trimble GPS receiver signal strength in signal to noise ratios (SNR).
At the prompt, type:
a 209 <Enter>
The terminal displays the Trimble SNRs.
If the RF-B! transmitter controller GPS Lock front panel indicator is off, the GPS receiver
has been disabled or has not received signals from enough satellites.
3. Display the error log.
At the prompt, type:
a 104 <Enter>
4. Check the error log for the following errors:
– <S_GPS_IS_DISABLED>
– <E_GPS_SELF_TEST_FAILED>
– <E_GPS_NOT_TRACKING_SATELLITES>
– <E_SASM_FREERUN_TIMEOUT>